SC2441A(2006) Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC2441A
(Rev.:2006)

1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation 

SC2441A

POWER MANAGEMENT

Absolute Maximum Rating

Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified

in the Electrical Characteristics section is not implied.

Parameter

Symbol

Maximum Ratings

Units

Input Voltage

Supply Voltage For Step-Down Controller

High-Side Driver Supply Voltages

FB1, FB2 Voltage

COMP1, COMP2 Voltages

CS1(+), CS1(-), CS2(+) and CS2(-)

Voltages

VIN

VCC

VBST1, VBST2

VFB1, VFB2

VCOMP1, VCOMP2

V V , V , V CS1(+), CS1(-) CS2(+) CS2(-)

-0.3 to 20

V

-0.3 to 20

V

-0.3 to 28

V

-0.3 to 20

V

-0.3 to 4.5

V

-0.3 to VCC

V

SYNC/SHDN Voltage

ROSC Voltage

SS1/EN1 AND SS2/EN2 Voltages

FB3 Voltage

SW3 Voltage

Maximum Junction Temperature

Thermal Resistance Junction to Case

Thermal Resistance Junction to Ambient

Storage Temperature Range

Lead Temperature (Soldering) 10 sec

ESD Ratings (Human Body Model)

VS/S

VROSC

VSS1, VSS2

VFB3

VSW3

TJ

θJC

θJA

TSTG

TLEAD

ESD

-0.3 to VIN+1

-0.3 to 2

-0.3 to 4

4

-0.3 to 30

150

2

37

-60 to 150

300

2000

V

V

V

V

V

°C

°C/W

°C/W

°C

°C

V

Electrical Characteristics

Unless specified: VIN = 2V, VCC = VBST1 = VBST2 =8V, SYNC/SHDN =2V, ROSC = 51.1kΩ, -40°C < TA = TJ < 105°C

Parameter

Symbol

Conditions

Min

Undervoltage Lockout

VCC Start Threshold

VCC UVLO Hysteresis

VCC Input Current

Channel 1 and 2 Error Amplifiers

VCCTH

VCCTL

ICC

VCC Increasing

VCC Decreasing

VCVCCVC=C=C4=V8V,8V,VVC,CSVT/SLS,=/SV=0SV/2S V=(22)V

Feedback Voltage

VFB1, VFB2

VIN = 3V, 5V < VCC < 10V

VIN

=

3V, 5V <

-40°C to

8V5C°CC<

10V,

0.494

0.495

Feedback Pin Input Bias Current

Amplifier Transconductance

Open Loop Voltage Gain

Amplifier Unity Gain Bandwidth

IFB1

IFB2

GM1, GM2

ao1, ao2

(Note 1)

Amplifier Output Sink Current

Amplifier Output Source Current

VFB1, 2 = 1V, VCOMP1,2 = 2.5V

19

VFB1, 2 = 0V, VCOMP1,2 = 2.5V

9

Typ

4.45

150

10

0.05

8

0.500

0.500

-60

-280

315

75

5

24

13

Max Units

4.55

V

mV

15

mA

1.0

11

0.506

V

0.505

V

-200

-500

29

16

nA

nA

µΩ−1

dB

MHz

µA

µA

 2006 Semtech Corp.

2

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